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7,019
RESULTS

Media Type
5,342
texts
948
movies
531
audio
102
web
36
images
25
software
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Topics & Subjects
1,511
NASA Technical Reports Server (NTRS)
1,225
AIR TRAFFIC CONTROL
637
traffic
483
ERIC Archive
440
DTIC Archive
414
Community Media
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Collection
1,899
American Libraries
1,511
NASA Network Resource and Training Site
603
Montana State Library
478
Education Resources Information Center (ERIC) Archive
454
The Community Media Archive
440
Defense Technical Information Archive
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Creator
1,511
nasa technical reports server (ntrs)
483
eric
440
defense technical information center
139
montana. highway patrol bureau
85
wikimedia foundation
71
north carolina. division of highways. statewide planning branch
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Language
5,889
English
47
undetermined
44
German
24
French
16
Spanish
15
Dutch
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